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/**
 * Copyright 2013 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.netflix.astyanax;

import com.netflix.astyanax.connectionpool.exceptions.WalException;

/**
 * 
 * @author elandau
 */
public interface WriteAheadEntry {
    /**
     * Fill a MutationBatch from the data in this entry
     * 
     * @param mutation
     */
    void readMutation(MutationBatch mutation) throws WalException;

    /**
     * Write the contents of this mutation to the WAL entry. Shall be called
     * only once.
     * 
     * @param mutation
     * @throws WalException
     */
    void writeMutation(MutationBatch mutation) throws WalException;
}